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My cousin's daughter is about a year and a half old and has blue eyes. My cousin has brown eyes his wife has blue eyes, my cousin's parents and grand parents have brown eyes. I took some biology in college and I'm pretty sure the genes for brown eyes are dominant.
I have my suspicions about what happened but is it even a slight possibility my cousin's daughter could have blue eyes?
My mother had blue eyes, my father had eyes so dark you couldn't see his pupils (1/8 American Indian) and my brother had blue eyes. The rest of us had green center/brown outside/hazel eyes.
My daughter has olive green eyes, her husband has brown eyes, their daughter has sapphire blue eyes. I have four blue eyed granddaughters. My son and his wife both have blue eyes too.
Now would you like the real question. Both my parents had rh positive blood. Dad was A positive, mom was O positive. My blood is A negative. My husband has A positive and both our children got a negative gene from his +/- positive blood and they are A negative also. I got into real trouble one day when I jokingly asked if I was adopted. Dad thought I was disrespecting my mother. I don't think I had ever seen him so angry. He said, "No you were not adopted." Things happen. I look like my dad's sister so I am sure he is right but I still wonder how I ended up with the negative blood. Only way it could be is that both my parents also have the +/- positive blood. Positive blood can be +/+ or +/-. Each parent gives you one blood gene.
It is very possible and common for the child to have blue eyes. Even two parents with brown eyes can have a child with another color. If this is your only reason to think the child is not his, let it go. Also it is none of your business.
It's very possible. My father has brown eyes as does both his parents. My mother has blue eyes. Out of three kids I'm the only one with brown eyes. Both my siblings have blue eyes. There is no doubt that my brown eyed father is the biological father of my blue eyed siblings.
I don't think this situation is rare at all.
Oh, BTW, a friend of mine who is black has a child with blue eyes (the mother is white with blue eyes). If black people can have blue eyed children I see no reason why Asians could not.
Can my cousin be heterozygous? We are asian. No one in our family has ever had any other eye color but brown.
Well you can't possibly know that for a start, you just can't go back far enough to say that.
In addition, if one of your family members on your side was the result of a well-kept secret philanderer with a blue eyed partner then how could you know that either? You might not be as "pure" as you think on your side.
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